第4次作业类测试代码+117+陈俊超

1.类图

 

2.完成界面和相应的功能

3.代码

package caculate;

import java.text.DecimalFormat;

public class Caculate {
      public String triangle(int a, int b, int c)
               {
                   String result;                
                  if(a<1 || a>100 || b<1 || b>100 || c<1 || c>100) {
                      result = "边的值不在范围内！";        
                  }
                  else if(a>=b+c || b>=a+c || c>=a+b)  {
                      result = "不构成三角形！";
                  }
                  else if(a==b && b==c){
                      result = "等边三角形"; 
                  }
                  else if((a-b)*(a-c)*(b-c)==0) {
                      result = "等腰三角形"; 
                  }
                  else if(a*a + b*b == c*c || a*a + c*c == b*b || c*c + b*b == a*a){
                      result = "直角三角形"; 
                  }
                  else {
                      result = "一般三角形";
                  }   
                   return result;
              }  
              //计算面积
              public String mianji(int a,int b,int c)
              {
                  String temp = triangle(a, b, c);
                  //保留两位小数
                  DecimalFormat df = new DecimalFormat("#.00");
                  float result=0;        
                  float p;    
                  String mianjiresult = null;
                  if(!temp.equals("边的值不在范围内！") &&!temp.equals("不构成三角形！"))
                  {
                      //海伦公式
                     p=(float) ((a+b+c)/2.0);
                     result=(float) (Math.sqrt(p*(p-a)*(p-b)*(p-c)));
                     mianjiresult=df.format(result);
                  }          
                  return mianjiresult;
              }
              
              //计算周长
              public int zhouchang(int a,int b,int c)
              {
                  String temp = triangle(a, b, c);
                  int result=0;
                  if(!temp.equals("边的值不在范围内！") &&!temp.equals("不构成三角形！"))
                  {
                      result=a+b+c;
                 }
                  return result;
   
              }
}

package caculate;

import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JLabel;
import java.awt.Font;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class Triangle extends JFrame {

    private JPanel contentPane;
    private JTextField atext;
    private JTextField btext;
    private JTextField ctext;
    private JTextField resulttext;
    private JTextField mianji;
    private JTextField zhouchang;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Triangle frame = new Triangle();
                    frame.getContentPane().setLayout(null);
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public Triangle() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        contentPane = new JPanel();
        contentPane.setLayout(null);
        setContentPane(contentPane);
        
        JLabel lab = new JLabel("\u8BF7\u8F93\u5165\u4E09\u89D2\u5F62\u7684\u4E09\u6761\u8FB9\uFF1A");
        lab.setFont(new Font("黑体", Font.PLAIN, 14));
        contentPane.add(lab);
        lab.setBounds(129, 10, 196, 32);
        
        JLabel laba = new JLabel("a:");
        laba.setFont(new Font("黑体", Font.PLAIN, 14));
        contentPane.add(laba);
        laba.setBounds(64, 73, 36, 23);
        
        JLabel labb = new JLabel("b:");
        labb.setFont(new Font("黑体", Font.PLAIN, 14));
        labb.setBounds(187, 73, 36, 23);
        contentPane.add(labb);
        
        JLabel labc = new JLabel("c:");
        labc.setFont(new Font("黑体", Font.PLAIN, 14));
        labc.setBounds(307, 73, 36, 23);
        contentPane.add(labc);
        
        atext = new JTextField();
        atext.setBounds(84, 73, 66, 21);
        contentPane.add(atext);
        atext.setColumns(10);
        
        btext = new JTextField();
        btext.setBounds(206, 73, 66, 21);
        contentPane.add(btext);
        btext.setColumns(10);
        
        ctext = new JTextField();
        ctext.setBounds(329, 73, 66, 21);
        contentPane.add(ctext);
        ctext.setColumns(10);
        
        final JButton btnOk = new JButton("OK");
        btnOk.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                 if(e.getSource()==btnOk)
                                      {
                                          Caculate cacu =new Caculate();
                                          int a=0,b=0,c=0;
                                          String A,B,C;
                                          A=atext.getText().toString();
                                          B=btext.getText().toString();
                                          C=ctext.getText().toString();
                                         
                                          //判断是否为数字
                                          if(A.matches("[0-9]+") && B.matches("[0-9]+") && C.matches("[0-9]+"))
                                         {                                              
                                             a = Integer.parseInt(A);
                                             b = Integer.parseInt(B);
                                             c = Integer.parseInt(C);
                                             resulttext.setText(cacu.triangle(a,b,c));
                                             mianji.setText(cacu.mianji(a,b,c)+"");
                                             zhouchang.setText(cacu.zhouchang(a,b,c)+"");
                                         }
                                         else
                                          {
                                              resulttext.setText("输入有误，请重新输入");
                                          }
                                     }
            }
        });
        btnOk.setFont(new Font("黑体", Font.PLAIN, 14));
        btnOk.setBounds(118, 119, 79, 23);
        contentPane.add(btnOk);
        
        final JButton btnCancel = new JButton("CANCEL");
        btnCancel.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                if(e.getSource()==btnCancel)
                {
                    atext.setText("");
                    btext.setText("");
                    ctext.setText("");
                    resulttext.setText("");
                    mianji.setText("");
                    zhouchang.setText("");
                     JOptionPane.showMessageDialog(null,"已重置");
                }
            }
        });
        btnCancel.setFont(new Font("黑体", Font.PLAIN, 14));
        btnCancel.setBounds(246, 119, 79, 23);
        contentPane.add(btnCancel);
        
        JLabel label = new JLabel("\u8FD9\u4E2A\u4E09\u89D2\u5F62\u662F:");
        label.setFont(new Font("黑体", Font.PLAIN, 14));
        label.setBounds(84, 164, 113, 23);
        contentPane.add(label);
        
        resulttext = new JTextField();
        resulttext.setBounds(183, 165, 136, 21);
        contentPane.add(resulttext);
        resulttext.setColumns(10);
        
        JLabel label_1 = new JLabel("\u9762\u79EF\u662F:");
        label_1.setFont(new Font("黑体", Font.PLAIN, 14));
        label_1.setBounds(64, 208, 54, 15);
        contentPane.add(label_1);
        
        mianji = new JTextField();
        mianji.setBounds(111, 205, 66, 21);
        contentPane.add(mianji);
        mianji.setColumns(10);
        
        JLabel label_2 = new JLabel("\u5468\u957F\u662F:");
        label_2.setFont(new Font("黑体", Font.PLAIN, 14));
        label_2.setBounds(233, 208, 54, 15);
        contentPane.add(label_2);
        
        zhouchang = new JTextField();
        zhouchang.setBounds(283, 205, 66, 21);
        contentPane.add(zhouchang);
        zhouchang.setColumns(10);
    }
}